What Fur said.

All this means is that they're done with textures and models, so they're pushing it out there. I'll have to remind myself to use the Loader to get it to download overnight. I expect that the data miners will have most of it sniffed out by Monday.

Judging from the testing schedule and state of the PTR, we have a while before the patch goes live. The work they have left, balance and ability changes can be a small patch on patch day ontop of the 500mb one.

That they said they'd delay a holiday says to me they have a LOT of work left to do. That kind of CYA is unusual for them.